It was a pre-Halloween treat for Mark Ruffalo and his wife Sunrise Coigney: The couple have welcomed a daughter, his rep confirms to PEOPLE exclusively.
The girl was born in Los Angeles. No other details were available.
This is the third child for Ruffalo, 39, and his wife, 34. The couple also have son Keen, 6, and daughter Bella, 2.
Ruffalo and Coigney, the owner of the L.A. Boutique Kaviar and Kind, wed in 2000. The actor is currently starring in the film Reservation Road opposite Joaquin Phoenix.